/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/Operations/SmoothBoneWeights.h
Compute smoothed weights at vertices and neighbors within distance and write the result into FDynamicMeshVertexSkinWeightsAttribute passed upon construction.
true if the algorithm succeeds, false if it failed or was canceled by the user.
bool SmoothWeightsAtVerticesWithinDistance ( const [TArray](API\Runtime\Core\Containers\TArray)< int32 > & Vertices, const float Strength, const double FloodFillUpToDistance, const int32 NumIterations )